Casting apparatus.



J. KRA'LUND, cJoucxwomn & M. STERN.

CASTING APPARATUS. APPLICATION FILED NOV. n. ma.

Patented Apr. 15, 1919,

3 SHEETS-SHEET l- J. KRALUND, C. DUCKWORTH & M. STERN.

CASTING APPARATUS. APPLICATION FILED Nov. :1. 191a.

Patented Apr. 15, 1919.

3 SHEETS-SHEET 2- .lullllllllllllll llll'ltl" l. KRALUND, C. DUCKWORTH &M. STERN.

CASTING APPARATUS. APPLICATION FILED NOV. 11 1918.

1,300,739., Patented Apr. 15, 1919.

3 SHEETS-SHEET 3- "run snares. earner ornron.

JOHN KRALUND AND CLARENCE nooxwoa'rn, or BROOKLYN, NEW YORK, AND Memosscreen,

0F TOLEDO,'OHIO, ASSIGNORS T0 DOEHLER DIE CASTING COMPANY, OF

BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

CASTING APPARATUS.

Application filed November 11, 1918. Serial No. 261,972.

all citizens of the United States, the first two above named residing inthe borough of Brooklyn, county of Kings and State of New York, and thethird above named residing at Toledo, in the county of Lucas and Stateof Ohio, have invented certain new anduseful Improvements in CastingAparatus, of which the following is a specication. Our invention relatesto paratus and particularly to mechanism whereby the die'- may beexpeditiously and with a minimum of labor opened and closed and lockedin closed position during the operatlon of making die-castings therein.In the preferred form of our device a horizontally movable ram or memberto which aportion of the die is secured 1S der with piston rod and crosshead, the

movement of the cross head serving to open is moved forwardly and backand is locked 1n 1ts forward position in which the die is justments areclosed, when the toggle joint is straightened. With such an arrangementossible to cause the closing movement of the die to take place at eachoperation in the same manner and with the same necessary amount ofpressure and with a minimum expenditure of time and labor. Suchapparatus is adapted to be used in connection with suitable devices forforcing molten metal under pressure into the die, such, for example, asthe apparatus described in application of John Kralund, 17, 1918. The

-- proved apparatus of the'character above briefly described.'

' In-order that our invention may be more clearly understood, attentionis hereby directed to the accompanying drawings, forming a part of thisapplication and illustrating one embodiment of our, invention; In

the drawings Figure 1 represents a vertical longitudinal section throughan apparatus embodying our invention, certain parts die-castingaprecipro-- cated by power means such as anair cyhn- I exact adbeingshown in side elevation, Fig; 2 is a top plan viewof the same, Fig. 3 1sa cross section taken on line 33 of F ig. 1, and Fig. 4 is a sideelevation of the melting pot and molten metal carrier device shown inFig. 1, certain parts being shown in section.

Referring to the drawings, the mechanism comprising our inventioncomprises a suitable frame 1 which may be of any suitable form such asthatillustrated. This frame or standard 1 is provided on its upersurface with a pair of bearing suraces, such 1 as the fiat surface 2 andthe inverted V-shaped surface 3 shown in Fig. 3 on which the frame 4 ismounted for longitudinal adjustment. Frame4 carries a horizontallydisposed power cylinder 5, which is mounted intermediate the side wallsof the frame 4 in any suitable manner as on the. flanges 6, 6 which areinwardly disposed from the side walls of theyframe 4. A top member 7 maybe slidably mounted onsuitable slideways on frame 4 for a purpose to beexplained, and may be provided with a pair of small cover members. 8 and9, adapted to be seated over suitable- Specification of ietters Patent.Patented A 15, 1919 suitable melting pot and furnace construction, themelting pot having meansfor forcing the molten metal into the gate oropening provided in member 10. One portion, a

11, of a die is secured to the member 10 by suitablemean's such as thebolts and nuts indicated at 12, 12, this die member having a gate oropening therein registering with the opening in the member 10.

'The' cylinder 5 is provided with a suitable pistonor plunger 13 havingapiston rod 14 extending forwardly therefrom through a suitable gland,this piston rod being secured to a block or cross head 15 adapted 'toreciprocate on a slideway 16, which is carried by the .frame 4. Theplunger 13 is reciprocated when desired by air or other suitable motivefluidwhich may be admitted to the cylinder on opposite sides of theplunger by means of pi e connections 17 and 18 provided with suitablevalves (not shown).

The member 19 of the die, which is adapted to be moved into and out ofengagement with the member 11 of the die when the die is to be opened orclosed, is suitably secured as by bolts and nuts20, 20, to the face of aram or horizontally movable member 21, which is preferably co-axial withpiston rod 14 and the cylinder 5, and which is integral with or securedto the slidably mounted top member 7. Operatlve connection between thecross head 15 and the ram 21 is established by means of a pair oflinkages which are adapted to act as toggles to lock the die in itsclosed position. As

illustrated, links 22, 22, are pivoted at their forward ends at 23, 23,to the ram21 on opposite sides of the latter. Other links 24, 24, arepivoted at their rear ends 25, 25, to horizontal flanges 26, 26,extending inwardly from the sides of frame member 4, the pivots 25 beingin longitudinal alinement with the pivots 23. The rear ends of links 22are pivotally connected to the for ward ends-of links 24 by means ofpins 27, 27, and links 28, 28, have their outer or forward endspivotally mounted on the same pins 27, 27. The inner ends of links 28are pivotally secured at 29, 29, to the cross head or block '15. Themanner in which thevafaces of links 24.

. cylinder rious' links referred to are formed is not material, butlinks 24 may suitably be formed with forked ends throughwhich pins 27extend, links .22 being pivoted on pins 27 between the forked endsoflinks 24, and links 28 maybe formed'with forked ends which arepivotally mounted on pins 27 above and below the top and bottom sur-With the construction described the forward. movement of plunger 13 andcross head-15 into the position shown in the drawings serves tostraighten out the toggles formed -by link'sj22 and 24, to press themember 21 forwardlyinto the position in- Which the die is closed and islocked inthe closed position by the alinement of links 22 and 24. Whenthe die is opened by causing the plunger 13 to move rearwardly in drawn'rearwardly, while links 24 swing in: wardly about the fixed centers 25,25, links 22 correspondingly swinging inwardly about 1 their pivots 23to break the toggles and to open the die by pulling member-21 rearwardlythrough the link connections 28, 22. The longitudinal position of frame4 on standard 1 may be adjusted in accordance with the dimensions of thedie members which are to be used for any particular series of castingoperations, so that the'forward movement of member 21 will be justsufiicient to close the die with the proper amount of pressure. This maybe accomplished by providing the frame 4 with outwardly extendingflanges 30, 30, through 5 the inner ends of links 28- are.-

openings in which extend the-threaded tie rods 31, 31, the forward endsof which exadjusted in correct position on the standard -1 and securedin such position by means of the nuts '33 on rods 31.

Suitable adjustable vided to limit themo'vements of the toggle jointsinto their straightened positions and to thereby slightly adjust thethrow of member 21. These 'stop members may suitably take the form of abolt 34 threaded into a suitable opening in the ram 21 and extendingrearwardly therefrom, and a bolt or member 35 extending forwardly fromthe cross head 15, bolt 34 being provided with ahead and lock nut, andpairof nuts, for securing the bolts in adjusted position. Member 35 isshown as an extension of piston rod 14, and is provided with a forwardlyextending portion 35 adapted to abut against the head of bolt 34 at theend of the forward movement of cross head 15. These stop members may beso adjusted that the cross head 15 is stopped Whenlinks 22 and 24 areexactly in alinement With in which case links 28 will extend inwardly atright angles to links 22 and-24, as shown.

sure through the gate. in member 10 into the die, this being a form-ofdevice covered by the said application of John Kralund,

Serial No. 245,263, although it is obvious that our present invention isnot limited in any way to the use of such a device. In the deviceillustrated a pivoted carrier or ladle 38 is provided Wiatha nozzle 39which "31s adapted to dip under the surface of the molten metal in themelting pot when the ladle device is in oneposition, so that a charge ofthe moltenmetal will flow into the interior of the ladle. Then thischarge is to be transferred to the die theladle devicev 38 is swung intothe position shown in' Fig. 4-by mechanism which it is not necessary todescribe in detail, so that the nozzle 39 will register with the gateopening in member 10, after which the charge is forced into the diebymeans of air which iscaused to flow under pressure through the flexibleforward movement of stops may also be promember 35 with a each other,

of a reciprocable actuating member, a mem connection 40 into theinterior of the ladle device 38.

It is obvious that the mechanism we have I described results in theeffective and rapid opening andclosing and locking of the die by thesimple operation of the valves ad mitting air or other motive fluid tothe op posite sides of plunger 13 in the cylinder 5. With this devicethe forward movement of ram 21 and the amount of pressure exerted on thedie in closing the same is limited and determined by the position of thelinks 22 and 24: in their straightened or forward positions. Theprovision of "the stop members on orosshead 15 and ram 21 also resultsin taking to a considerable extent the stresseswhich otherwise would becarried by the pivot pins 25 and 23. While the form of deviceillustrated and described is thought to be most effective, it shouldbeunderstood, however, that our invention is not strictly limited to theexact details of construction described and that our invention isnot'necessarily limited to the use of a power' cylinder such as thatillustrated since other forms of mechanism may be used for causing thereciprocation of a member such as the cross head 15 or-for otherwiseoperating the toggle construction.-

' What we claim is; v 1. In a casting machme, the combination ber towhich a portion of a die may be secured, movable into positions to closeand open the die, a frame, andtoggle connections between said frame andmembers adapted to move said second member and to straighten the toggle,to form a lock, when said member has been movedto close the die.

2. In a casting machine, the combination of a power cylinder, a piston,piston rod and cross head therefor, a member to which a portion of a diemay be secured, movable into positions to close and open the .die, aframe, and toggle connections between said frame, cross head, andmember, adapted to move said member and to' straighten the toggle, toform a look, when said member has been moved to close .the

die.

3. In -acasting machine, the combination of a fixed frame, having aslideway, a block mounted to reciprocate thereon, a member to which aportion of a die may be secured, movable in the same directions as saidblock, to close and open the die, a link pivoted to said member, a linkpivoted to said frame at one end and pivoted at its opposite end' to thefree end of said first link, said links being adapted to extend in anapproximately straight line when the die is closed, and a link pivotallyconnecting the pivotalconnection between said first two links and said'block,'and adapted to close or open the.

. tions to close and open the die, and contoggle formed by said firsttwo links, as

' 4. In a casting machine, the combination of a fixed frame, ajpowercylinder carried thereby, a piston, piston rod and cross head forsaid'cylinder, a member to which a portion of a die may be secured,movable in the axial direction of said cylinder into posinections formoving said member and locking the same in the forward position in whichthe die is closed, comprising links pivoted to said member and extendingrearwardly therefrom, links pivoted tosaid frame and extending forwardlytherefrom, pinspivotally connecting the adjacent ends of said rearwardlyand forwardly extending links, said links being adapted to extend instraight lines when said member is in its forward position, and linkspivotally connected to said pins and extending inwardly therefrom topivotal connections with said cross head.

5. In a casting machine, the combination of a fixed frame, a membermounted to4re-.

vciprocate, a member to which a portion of a die may be secured, movablein the same directions assaid first member, to close and open the die, alink pivoted at one end to said second member, a link pivoted at one endto said frame and at its opposite of said first member, and a linkpivotally connecting the pivotal connection between said first two linksand said first member, and adapted to close or open the toggle formed bysaid' first two links, and to move said second member forward or back,as said first member moves forward or back.

6. In a casting machine, the combination of a frame, a member mounted toreciprocate thereover, a member to which a portion of a die may besecured, links pivotally secured to said second member and frame, and toeach other, to form a toggle, adapted to straighten when said secondmember is in forward position, a link pivotally connected to said firstmember and to the pivotal connection between said first two links, toopmember, to which a portion of a die may be secured, links pivoted tosaid frame, second member and first member, and to each other, to form atoggle, operable from said first member and adapted to straighten whensaid members are in forward position, and adjustable stop means carriedby, said first and second members, adapted to engage vat the end of theforward movements of said members to adjust the forward position of thetoggle,

S. In a casting-machine, the combination.

of a frame, a member mounted to reciprocate thereover, a member inadvance of said first member, to which a portio'n of a die may besecured, toggle connections between said frame and members adapted tomove said asoopea said frame with respect to said last member;

This specification signed and witnessed this 25th day of October, 1918.

. JOHN KRALUND; Witness:

JOSEPH Home. This specification signed and witnessed this 28th day ofOctober, 1918 CLARENCE DUCKWORTH. Witnesses JosEPH Home, CHAS. PACK.This'specification signed and witnessed this 30th day of October, 1918.

I MARCUS STERN. Witnesses:

JoHN'A. TALLMAN, CLARENCE E. PRANGE.

